Power press



Sept. 23, 1958 Filed April 10, 1956 FIGLI.

H. D. CHALLEN POWER PRESS 3 Sheets-Sheet 1 @MS'M H. D. CHALLEN- Sept.23, 1958 POWER PRESS 3 Sheets-Sheet 2 Filed April 10, 1956 VmimATra/e/vey p 1953 H. D. CHALLEN 2,852,970

POWER PRESS Filed April 10, 1956 5 Sheets-Sheet 3 A/ yaw/ma 49m y JEN/5O/ALL 54/ United States Patent i POWER PRESS Henry Denis Challen,Wellington, England, assignor to Taylor & Challen Limited, Birmingham,England, a British company Application April 10, 1956, Serial No.577,258

3 Claims. (Cl. 78-13) This invention relates to improvements in powerpresses and relates more particularly to power presses designed for suchwork as stamping and forging.

One object of the invention is to provide in a press means for formingin a stamping or forging a hole which is inclined with respect to theline of motion of the slide of the press.

According to the invention in a power press a punch or like tool adaptedto form an inclined hole in a stamping or forging is inclined to theline of movement of the main slide or ram of the press and is carried bya plug or holder on a cross slide which is guided for transversemovement on the main slide, and surfaces on the cross slide inclined tothe line of movement of the main slide at the same angle as the punchco-operate with complementary fixed surfaces inclined at the same angle,whereby as the main slide makes an operative stroke the cross slide ismoved transversely on the main slide and the combination of themovements of the main slide and cross slide produces a truly axialmovement of the punch at the required angle of inclination to the lineof movement of the main slide.

On the return stroke of the main slide the cross slide returns to itsinitial transverse position and the punch is withdrawn axially from thework. To assist in the return movement of the cross slide it may carry aroller adapted to engage a fixed surface on the press which is inclinedat the same angle as the fixed surfaces with which the'inclined surfaceson the cross slide engage.

The cross slide is conveniently mounted in V guides on the main slidefor movement at right angles to the line of movement of that slide andthe fixed inclined surfaces are formed on dogs which are mounted on orin a bolster fixed to the frame of the press.

One practical embodiment of the invention is illustrateddiagrammatically in the accompanying drawings which show the parts of apress concerned in the invention.

In these drawings:

Figure 1 is a front elevation in part section showing the parts in thepositions they assume at the end of the operative stroke of the mainslide or ram of the press.

Figure 2 is a plan of the cross slide.

Figure 3 is a front elevation of the press embodying the slide.

In the drawings a is the main slide or ram of a press which makes avertical operative stroke.

A cross slide b is slidably guided for tranverse movement on the mainslide or ram at right angles to the line of movement thereof, the crossslide being mounted in V guides (not shown). A holder or plug c mountedon the lower face of the cross slide carries a punch d which is inclinedto the line of movement of the main slide or ram and is adapted to forman inclined hole in a stamping or forging indicated at s.

In order to impart a truly axial movement to the punch the cross-slide bis arranged to move transversely 2,852,970 Patented Sept, 23, 19,58

on the main slide or ram as the latter moves downwardly. For thispurpose a rectangular notch e is formed in one end of the cross-slideand a slot 1 is formed in the slide in alignment with the notch. Theinner end of the notch e and both ends of the slot are inclined to theline of movement of the main slide at the same angle as the punch andco-operate with the complementarily inclined faces of dogs g, h whichare mounted on a bolster fixed to the frame of the press.

Thus as the main slide descends on its operative stroke the cross slideis moved transversely by the dogs and the combination of these movementsproduces an axial movement of the inclined punch into the work.

On the return stroke of the main slide the dogs return the cross slideto its initial transverse position and the punch is withdrawn axiallyfrom the work.

The return movement of the cross-slide is assisted by a roller j whichis mounted on a laterally projecting lug k on one end of the slide andis adapted to engage an inclined surface I on the press which isparallel to the operative faces of the dogs.

It will be appreciated that the drawings show only the inclined punchwhich forms an inclined hole in the work and that the work which isclamped in dies may be acted upon simultaneously by a tool carried bythe main slide and by other tools actuated from the main slide andentering the dies from one or each side and/or from a direction opposedto that of the main slide.

One example of work to which the invention is applicable is the hotstamping or forging of water tap bodies in which the axis of the outletis at an angle other than a right angle to the axis of the tap spindle.Another example is a T union body in which one of the passages is not atright angles to the other.

If the press is engaged on work which does not require an inclined holethe cross slide and the dogs can readily be removed without affectingthe other motions of the press.

Figure 3 illustrates a typical press to which the invention is applied,and those parts shown in the earlier figures which are visible also inthis figure are indicated with the same reference letters.

I claim:

1. A power press comprising a stationary frame, a main slide mountedthereon for reciprocating motion in respect to the frame in a firststraight path, a cross slide mounted upon the main slide forreciprocating motion in respect to the main slide in a second straightpath lying transversely of the first path, the frame and cross slidehaving surfaces one at least of which is inclined obliquely in respectto both the first and second paths, said surfaces slidably contactingone another on travel of the main slide in one direction in said firstpath and biasing the cross slide in one direction along said secondpath, whereby the .cross slide is bodily moved along a third straightpath extending obliquely to both the first and second paths in adirection predetermined by the ratio that the distance the cross slideis biased in said one direction thereof along said second path bears tothe distance the main slide is moved in said one direction there'- ofalong the first path, and a tool carried by the cross slide and havingits length projecting from the cross slide along said third path forpassage in the direction of its length into a work piece.

2. A power press as in claim 1, said frame including a projectionrigidly formed thereon, said projection extending in the path ofreciprocating motion of the main slide and having an inclined surfaceconstituting one of said surfaces, the projection being disposed inposition to engage the cross slide on movement of the main slide in saidone direction thereof, the cross slide having an edge constituting theother surface.

ice,

3. A power press as in claim 1, further including second surfaces on thecross slide and frame respectively, said second surfaces carnminglyengaging each other on movement of the main slide in a return directionin said first path, one at least of said second surfaces being inclinedcorrespondingly to said one of the first surfaces for biasing of thecross slide in said second path in a return direction thereof responsiveto movement of the main slide in said first path in its returndirection.

References Cited in the file of this patent UNITED STATES PATENTS

